This photo provided by passenger Haley Ebert shows damage to an engine on what the FAA says is a Boeing 777 after parts came off the jetliner during its flight from San Francisco to Honolulu Tuesday, Feb. 13, 2018. The plane landed safely as emergency responders waited nearby. United Airlines spokeswoman Natalie Noonan says Flight 1175 made an emergency landing due to a mechanical issue. (Haley Ebert via AP)

HONOLULU (AP) — A United Airlines flight landed safely Tuesday in Honolulu after an engine cover came off during its flight from California, the airline said.

"Our pilots followed all necessary protocols to safely land the aircraft," United said in a statement, adding that all passengers departed the Boeing 777 normally at the gate.